Update widestring requirement from 0.4.2 to 0.5.0 (#21)

Updates the requirements on [widestring](https://github.com/starkat99/widestring-rs) to permit the latest version.
- [Release notes](https://github.com/starkat99/widestring-rs/releases)
- [Changelog](https://github.com/starkat99/widestring-rs/blob/main/CHANGELOG.md)
- [Commits](VoidStarKat/widestring-rs@v0.4.2...v0.5.0)

---
updated-dependencies:
- dependency-name: widestring
  dependency-type: direct:production
...

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Author: dependabot[bot]

Cargo.toml

@@ -27,7 +27,7 @@ default-target = "x86_64-pc-windows-msvc"
 libloading = "0.7.0"
 com-rs = "0.2.1"
 bitflags = "1.2.1"
-widestring = "0.4.2"
+widestring = "0.5.0"
 thiserror = "1.0"
 
 [target.'cfg(windows)'.dependencies]